For a book, the best available for someone who is starting out is Steve Booth's. He covers everything from the rules to somewhat advanced strategies.

Dr. Dave and I did a 5-video series on one pocket, if visual learning is better for you.

Eddie Robin's two books, "Winning One Pocket", and "Shots, Moves & Strategies", have a lot of ideas and info, but they're pretty expensive. If you haunt Ebay and are patient, you can get them for maybe $300 and $200 respectively. Add 50% and you will find them a lot faster. If you find them "cheap", you will probably be able to sell them for at least what you paid. It looks like there is a SM&S up now on Ebay for $212 with free shipping.

Tom Wirth's book is for somewhat advanced players, and is largely a discussion of the correct shots -- which is better under which conditions -- in a bunch of typical table layouts.

Jack Koehler has a book on one pocket, but it's pretty basic. There is also a section on one pocket in George Fels' book, "Mastering Pool", but it's also fairly basic.